I managed to fix the jittery output. The 8th pot was defective, causing the MC's analog input to float without a steady reference I guess.
Anyway, that one defective pot messed up the other 7 in that group. I guess the mod wheel was on some kind of isolated circuit? I dunno..
Just glad the new pot I put in fixed it!
Additionally, the old pot must have been impacted by the PO. Not only damaging the pot, but also the trace/pad for that pot's wiper lead. It was lifted from the PCB when I went in to desolder it!
The new pot's lead is barely making connection.. If it goes bad again, I may have to just remove the pot and ground the input to stabilize the rest.
I still have NRPN problems.
This is a link to the Oxygen's manual..
http://www.m-audio.com/images/global/manuals/051014_OxyLine_UG-EN01_V1.PDF
Here's a copy of what MIDIOX showed when I setup a knob to nrpn control "90", the VCF LFO1 Mod Depth. I have "GL 16 00" as my global setting.
024DEEAE 1 -- B0 62 5A 1 --- CC: NRPN LSB
024DEEAF 1 -- B0 63 00 1 --- CC: NRPN MSB
024DEEB0 1 -- B0 06 01 1 --- CC: Data Entry MSB
024DEEE0 1 -- B0 06 02 1 --- CC: Data Entry MSB
024DEF14 1 -- B0 06 04 1 --- CC: Data Entry MSB
024DEF74 1 -- B0 06 06 1 --- CC: Data Entry MSB
024DEFCB 1 -- B0 06 07 1 --- CC: Data Entry MSB
024DF045 1 -- B0 06 08 1 --- CC: Data Entry MSB
024DF078 1 -- B0 06 09 1 --- CC: Data Entry MSB
024DF0CA 1 -- B0 06 0A 1 --- CC: Data Entry MSB
024DF15D 1 -- B0 06 0B 1 --- CC: Data Entry MSB
024DF1C3 1 -- B0 06 0C 1 --- CC: Data Entry MSB
024DF256 1 -- B0 06 0D 1 --- CC: Data Entry MSB
024DF2CB 1 -- B0 06 0F 1 --- CC: Data Entry MSB
024DF3BB 1 -- B0 62 5A 1 --- CC: NRPN LSB
024DF3BC 1 -- B0 63 00 1 --- CC: NRPN MSB
024DF3BD 1 -- B0 06 10 1 --- CC: Data Entry MSB
024DF44E 1 -- B0 06 11 1 --- CC: Data Entry MSB
024DF529 1 -- B0 06 12 1 --- CC: Data Entry MSB
No response whatsoever from the HAWK with the above stream of msgs, post surgery.
Any ideas?
Thanks,
-Blaine
--- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@...> wrote:
>
> Check for a midi loop.
>
> Send the text of a batch of the CC messages you're seeing on MIDI-OX.
>
>
> Mike
>
>
>
> ________________________________
> From: bimmerfan222 <bperkins211@...>
> To: korgpolyex@yahoogroups.com
> Sent: Tuesday, July 30, 2013 8:55 AM
> Subject: [korgpolyex] Maudio midi controller problems..
>
>
>
> Â
> Ok, this one has me stumped.
>
> I have a Maudio Oxygen 8 V2 that I just picked up.
>
> For some odd reason, I cant get the 8 assignable knobs to send proper CC messages.
>
> Hooked up to the HAWK either direct or indirect thru the PC. I can see the messages in MIDIOX go thru fine. But the HAWK only partially responds to any of the knobs.. it's like it hears it for a moment, then suddenly does not hear it.
> If I turn the knob really slow, I can get more reaction from the HAWK, but it's still jittery.
>
> Odd thing is, the assignable Mod Wheel (next to the pitch wheel). Will send a CC flawlessly.. no jitters or problems whatsoever.
>
> So what would cause this? Again, I can see it sending all the messages in MIDI OX, but HAWK seems to only pick up part of the msg stream when using one of the 8 knobs.
>
> I do know that the very last knob has an issue where it wants to deviate to "33" when it is set to 0-127. I have disabled it, I suspect it has a cold joint or defective pot. The others dont act like that.
> Looking at the PCB, it appears each knob has it's own path to the main CPU (tiny stamp sized PIC thing).
>
> Any ideas? I was hoping to splice in a organ pedalset into the keyboard matrix later on.. but this knob issue has me scratching my head.
>
> -Blaine
>